import '../school_navigation_policy.dart';

class UndergraduateNavigationPolicy {
  static bool canNavigate(Uri uri, {required bool isMainFrame}) =>
      uri.scheme == 'https' &&
          uri.port == 443 &&
          uri.userInfo.isEmpty &&
          const {
            'eams.uestc.edu.cn',
            'idas.uestc.edu.cn',
            'eportal.uestc.edu.cn',
          }.contains(uri.host) ||
      !isMainFrame && uri.toString() == 'about:blank';
  static bool isDataPage(Uri uri) =>
      canNavigate(uri, isMainFrame: true) &&
      uri.host == 'eams.uestc.edu.cn' &&
      uri.path.startsWith('/eams/');
  static bool isLogout(Uri uri) =>
      isDataPage(uri) && uri.path == '/eams/logout.action';
  static Uri? secureIdentityRedirect(Uri uri) {
    final identity = SchoolNavigationPolicy.secureIdentityRedirect(uri);
    if (identity != null) return identity;
    // Legacy duplicate-login links use HTTP even within the HTTPS portal.
    if (uri.scheme != 'http' ||
        uri.host != 'eams.uestc.edu.cn' ||
        uri.port != 80 ||
        uri.userInfo.isNotEmpty ||
        !(uri.path == '/eams' || uri.path.startsWith('/eams/'))) {
      return null;
    }
    return Uri(
      scheme: 'https',
      host: uri.host,
      path: uri.path,
      query: uri.hasQuery ? uri.query : null,
      fragment: uri.hasFragment ? uri.fragment : null,
    );
  }
}